If one is limited by some formulas only, he is described as an animal which is bound up by the chain of the master and cannot move beyond the length of the chain. So we are concerned with persons who are not chained by anything: Revision history
Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.